‘HSC’ or “hazardous chemical substance” is identified as any toxic, harmful, corrosive, irritant or asphyxiant substance, or a mixture of such substances in the workplace. A Chemical Risk Assessment will help employers to identify and manage the risk from chemical exposure, as per the Regulations for Hazardous Chemical Substances, 1995, Regulation 5. Employers Legal Responsibilities are: Employee’s Responsibilities are: For more information on Hazardous Chemical Substances go to: www.hse.gov.uk